Not able to scale constrains of character for simulation and not seeing contrains for all body joints

Hello,
I am facing problem while doing simulation in unreal engine. I cant edit the constrains for the body to act as a colliders i can translate them or rotate them but cant scale them and also not seeing all the constrains as well only selected few constrains. the character that i am using is self made model. I tried using models from Maximo and character creator i can edit the constrains move them rotate them and even scale them and also i am getting constrains for all the joints in the body but when i try the same for my model its not working. Below i have added picture of the constrains i am getting
Kindly let me know what to do so problem can be resolved.
Thank you